Well, I hope your inkling proves correct.

I'd love for us to win, but I think it's less likely than a relatively even draw.
I'd argue it wasn't actually a clutch moment - too early in the season to mean much (places fluctuated wildly after each game), our unbeaten run hadn't stretched long enough to assume undue significance, there were no major hoodoos to be broken (I think I'm right in saying that we'd beaten City twice in the last three meetings at the Lane prior to that game) and we were still opening up in terms of regaining last season's form. It was a beautiful, unforgettably dominant performance, but it sort of illustrates what I mean when I say that we do our best work in the shadows away from public scrutiny or expectations.
As a counter-example from the immediate past, we faced a series of clutch moments last season in our fruitless quest to catch Leicester - we took on the first few (up until United) with aplomb, but then stumbled and fell apart as the public scrutiny reached a fever pitch. Ultimately, we even managed to finish behind Arsenal again. This season, we went into the Chelsea game with the ability to break the hoodoo Stamford Bridge still exercises over us and reassert our title credentials up front and center against the front-runners, and we sort of fell apart in the second half and lost both the game and our unbeaten run.
I'll stick by my point, I think. We generally don't do well in clutch moments when the pressure's on. We do sometimes - that's what makes those moments so memorable. We did in 2009-2010, over a sustained period of games *filled* with hoodoos we previously were laid low by (we beat Arsenal in the league for the first time in ages, we beat Chelsea at home during a monstrously good season for them, we beat typically defensive and niggly Bolton to keep us ahead of City, and then we comfortably beat Mancini's men away when the eyes of the media and the world were on us). We did in 2012-2013, when we remained steady and relentless all the way through the second half of the season, even as Arsenal went on an unreal run of form to finish ahead of us. And we've done well in clutch moments in individual games plenty of times. But those moments are in the minority compared to the times we've faltered or failed, and I don't think we're quite ready to cross that bridge yet.
We just aren't that sort of club yet, and haven't been for a long, long time. We're no Leicester.